“One of the main ways Facebook gathered data in its early days was by encouraging new users to share their contacts with the platform. This resulted in many people having their phone numbers and email addresses shared with the tech giant, even if they never signed up to use Facebook or its other services.”
If you click right here, the good folks at Reclaim the Net will walk you through deleting your contact info from Meta.
That doesn't seem to make sense. I understand I am supposed to upload my contact data so they can check if they had it, and block it from being re- uploaded? If I do that and they had my data, I am uploading it to them again, refreshing their dataset about me, making it more valuable. If they didn't have my data, well now I have given it to them? Not a good solution in my opinion.
I think, not checking if they have data is better. If you check, you make sure they have it. If you don't, they might not have it. Schroedinger style.